I'm running them. For around 300 bucks they are 100 times better than stock shocks. I can't tell too much difference with the damping settings. I've put around 1500 miles on them and they still feel pretty good. For the money I'd recommend them. If I were to do it again, I'd go with some rebuilt bilsteins and stiffer shocks.

I have them, they're not bad, but they are prone to leakage. I wouldn't buy them from eBay due to warranty issues. KYB will not replace them if bought from eBay. I called KYB and asked that's why I know. Buy them from a reputable dealer. TireRack or RSpeed. I bought mine from eBay and after 6 months my rear shocks leaked. Had to buy my replacement from Tire Rack after asking KYB about their warranty.

Some say the AGX cant handle any stiffer springs without leaking. I think thats why Shaikh is promoting the tokico illuminas more now.

The thing to me is should you pay for [shocks, springs, bumps, boots, mounts, GC sleeves] or just buy something like Tein Flex or something around that level and get it all for close to the same money.

I've had 3 sets. All leaked when used with ground controls after 20-25k miles. I have since changed to Bilsteins on all my Miatas.

I've seen this happen to 2 other cars. I've had no problems with my bilsteins, and they were still nice and stiff at 100k miles on my vw...yes, I had them for 100k miles and they valves in them were still good for daily driving. The guy I just sold the car to was going to get the revalved, and they don't need it.

The Tokico Illuminas will handle a higher spring rate then the AGX's (450 lb/in instead of 350 lb/in for the AGXs) and they have a much better damping curve for both road holding and ride comfort.
Much more proportional bound/rebound damping then the AGXs, which have very little bound (less then stock, even at setting 8) and loads of rebound damping.

If you can spare the few extra bucks, get the Tokicos. If you can't the AGX's are ok (I run them on my car) and feel decent when matched to a stock spring, and good matched to a 200 lb/in spring.